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3471cba18a
Change-Id: I3322366ebfa7db1d1f1e0fe60c808efd839b2858 Signed-off-by: Antonio Vázquez <antoniovazquezblanco@gmail.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/89369 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Anastasia Klimchuk <aklm@chromium.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* SPDX-License-Identifier: GPL-2.0-only
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* SPDX-FileCopyrightText: 2009 Carl-Daniel Hailfinger
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* SPDX-FileCopyrightText: 2022 secunet Security Networks AG and Thomas Heijligen <thomas.heijligen@secunet.com>
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*/
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/*
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* inline functions and macros shared by endian conversion functions
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*/
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#ifndef ___SWAP_H___
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#define ___SWAP_H___ 1
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#include <stdint.h>
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/* swap bytes */
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/* OpenBSD has conflicting definitions for swapX, _swap_X and __swapX */
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static inline uint8_t ___swap8(const uint8_t value)
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{
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return (value & (uint8_t)0xffU);
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}
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static inline uint16_t ___swap16(const uint16_t value)
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{
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return ((value & (uint16_t)0x00ffU) << 8) |
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((value & (uint16_t)0xff00U) >> 8);
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}
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static inline uint32_t ___swap32(const uint32_t value)
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{
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return ((value & (uint32_t)0x000000ffUL) << 24) |
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((value & (uint32_t)0x0000ff00UL) << 8) |
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((value & (uint32_t)0x00ff0000UL) >> 8) |
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((value & (uint32_t)0xff000000UL) >> 24);
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}
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static inline uint64_t ___swap64(const uint64_t value)
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{
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return ((value & (uint64_t)0x00000000000000ffULL) << 56) |
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((value & (uint64_t)0x000000000000ff00ULL) << 40) |
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((value & (uint64_t)0x0000000000ff0000ULL) << 24) |
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((value & (uint64_t)0x00000000ff000000ULL) << 8) |
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((value & (uint64_t)0x000000ff00000000ULL) >> 8) |
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((value & (uint64_t)0x0000ff0000000000ULL) >> 24) |
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((value & (uint64_t)0x00ff000000000000ULL) >> 40) |
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((value & (uint64_t)0xff00000000000000ULL) >> 56);
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}
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/*
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* macro to return the same value as passed.
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*
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* `___return_same(cpu_to_le, 8)`
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* expands to
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* `uint8_t cpu_to_le8 (const uint8_t value) { return value; }`
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*/
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#define ___return_same(name, bits) \
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uint##bits##_t name##bits (const uint##bits##_t value) { return value; }
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/*
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* macro to return the swapped value as passed.
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*
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* `___return_swapped(cpu_to_be, 8)`
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* expands to
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* `uint8_t cpu_to_be8 (const uint8_t value) { return ___swap8 (value); }`
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*/
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#define ___return_swapped(name, bits) \
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uint##bits##_t name##bits (const uint##bits##_t value) { return ___swap##bits (value); }
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#endif /* !___SWAP_H___ */
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